call_user_func_array
call_user_func_array — 调用回调函数，并把一个数组参数作为回调函数的参数
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mixed call_user_func_array ( callable $callback,array $param_arr )
把第一个参数作为回调函数（callback）调用，把参数数组作（param_arr）为回调函数的的参数传入。
例子：
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function foobar($arg,$arg2) {
echo __FUNCTION__," got $arg and $arg2\n";
}
class foo {
function bar($arg,$arg2) {
echo __METHOD__," got $arg and $arg2\n";
}
}
// Call the foobar() function with 2 arguments
call_user_func_array("foobar",array("one","two"));
dump("
");
// Call the $foo->bar() method with 2 arguments
$foo = new foo;
call_user_func_array(array($foo,"bar"),array("three","four"));
输出结果：
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foobar got one and two
foo::bar got three and four
